GAS5 and esophageal cancer: Additional lncRNAs associated with the stem phenotype in cancer include GAS5 (growth arrest specific 5) [144], LncRNA-RP11-567G11.1, LncRNA-UC.345, and LncRNA STXBP5-AS1 (STXBP5 antisense RNA 1) in pancreatic cancer; LncRNA HAND2-AS1 (heart and neural crest derivatives expressed transcript 2 antisense RNA 1) [145] in liver cancer; LncRNA-UCA1 (urothelial carcinoma associated 1) in cervical cancer; and FMR1-AS1 (FMR1 antisense RNA 1) [146] in esophageal cancer.